安卓筆記俠

 1 @Override  
 2     public int onStartCommand(Intent intent, int flags, int startId) {  
 3   
 4         // 第一個參數是總時間， 第二個參數是間隔  
 5         mCodeTimer = new CountDownTimer(60000, 1000) {  
 6             @Override  
 7             public void onTick(long millisUntilFinished) {  
 8                 // 廣播剩余時間  
 9                 broadcastUpdate(IN_RUNNING, millisUntilFinished / 1000 + "");  
10             }  
11   
12             @Override  
13             public void onFinish() {  
14                 // 廣播倒計時結束  
15                 broadcastUpdate(END_RUNNING);  
16                 // 停止服務  
17                 stopSelf();  
18             }  
19         };  
20         // 開始倒計時  
21         mCodeTimer.start();  
22         return super.onStartCommand(intent, flags, startId);  
23     }  
24   
25     // 發送廣播  
26     private void broadcastUpdate(final String action) {  
27         final Intent intent = new Intent(action);  
28         sendBroadcast(intent);  
29     }  
30   
31     // 發送帶有數據的廣播  
32     private void broadcastUpdate(final String action, String time) {  
33         final Intent intent = new Intent(action);  
34         intent.putExtra("time", time);  
35         sendBroadcast(intent);  
36     }  

// 注冊廣播  
    private static IntentFilter updateIntentFilter() {  
        final IntentFilter intentFilter = new IntentFilter();  
        intentFilter.addAction(RegisterCodeTimerService.IN_RUNNING);  
        intentFilter.addAction(RegisterCodeTimerService.END_RUNNING);  
        return intentFilter;  
    }  
 // 廣播接收者  
    private final BroadcastReceiver mUpdateReceiver = new BroadcastReceiver() {  
        @Override  
        public void onReceive(Context context, Intent intent) {  
            final String action = intent.getAction();  
            switch (action) {  
                case RegisterCodeTimerService.IN_RUNNING:  
                    if (btnCountdown.isEnabled())  
                        btnCountdown.setEnabled(false);  
                    // 正在倒計時  
                    btnCountdown.setText("倒計時中(" + intent.getStringExtra("time") + ")");  
                    Log.e(TAG, "倒計時中(" + intent.getStringExtra("time") + ")");  
                    break;  
                case RegisterCodeTimerService.END_RUNNING:  
                    // 完成倒計時  
                    btnCountdown.setEnabled(true);  
                    btnCountdown.setText(R.string.countdown);  
  
                    break;  
            }  
        }  
    };  
    @Override  
    protected void onResume() {  
        super.onResume();  
        // 注冊廣播  
        registerReceiver(mUpdateReceiver, updateIntentFilter());  
    }  
  
    @Override  
    protected void onPause() {  
        super.onPause();  
        // 移除注冊  
        unregisterReceiver(mUpdateReceiver);  
    }